Change the
sentences into the Passive Voice.
    Fred will book seats in advance.
     They left their coats in the cloakroom ten minutes ago.
     Susan bought a programme yesterday.     A wonderful curtain covers the stage.
     The orchestra will begin to play the overture in a mi­nute.
     Their repertoire includes both classics and modern plays.
     Every season the company adds several new produc­tions to its repertoire.
    We didn't use the
opera-glasses at the theatre yester­day evening.